That's a shame. Is there no alternative? https://superuser.com/q/1075075/904401 doesn't provide much hope.

its clearly says built from arch repos its the latest and greatest you wont get any newer i have a beefy setup so i can use utilize the latest packages e.g qt and gtk f you want it for ubuntu or...

The latest FIrefox Binary works on Ubuntu 18.04, but this Appimage does not. This Appimage is asking for glibc 2.38 even though THe binary doesn't require it. If this was compiled on Ubuntu 20.04...

It doesn't work in OpenSuse Kde-Plasma 6 but if you unzip it into a folder and from add sddm you go to the file, you can install it as I did. Good theme. Thank you.

No funciona en OpenSuse Kde-Plasma 6 pero si lo descomprimes en una carpeta y desde añadir sddm vas al fichero, lo puedes instalar como he hecho yo. Buen tema. Gracvias.